Andrew Ellicott Douglass and the Giant Sequoias in the Founding of Dendrochronology
نویسنده
چکیده
The Giant Sequoia played several crucial roles in the founding of the modern science of tree -ring dating. These included at least two central theoretical constructs and at least two minor ones; however, historical studies of dendrochronology are actively continuing and this list is expected to expand. Second only to the importance of the ponderosa pine (Pinus ponderosa) in the earliest days of the infant science, the Giant Sequoia (Sequoiadendron giganteum) was at the very center of the establishment of the discipline of dendrochronology. How the sequoia came to be used by A.E. Douglass, and what vital information and how it provided such information is the topic here.
منابع مشابه
Discovery of the 5.7-Year Douglass Cycle: A Pioneer’s Quest for Solar Cycles in Tree-Ring Records
The astronomer A.E. Douglass is generally recognized as the founding father of dendrochronology. He studied tree rings in the search for evidence that solar variation (as seen in sunspots) is reflected in climate variation. He was convinced that his quest was successful. Analysis of some of his early data using Fourier decomposition and comparison of tree-ring periodograms with those based on k...
متن کاملSelected Perspectives on the Giant Sequoia Groves
Several perspectives on the groves are briefly treated. Broader appreciation is needed of the giant sequoia groves which are not famous and easily accessible. The USDA Forest Service administers the largest single ownership of natural giant sequoia grove acreage. The giant sequoia groves have major resource values in addition to old-growth giant sequoias. Certain giant sequoias should be consid...
متن کاملMulti-century regional western spruce budworm outbreak patterns.
D endrochronology's rich tradition has foundations rooted in the works of da Vinci and MalpighF. Although the main stem of principles was developed by A.E. Douglass (see Ref. 1), one branch of dendrochronology actually pre-dates his work. The association between narrow tree rings and damage by insects, hail and frost was recognized by Hartig in Europe at the end of the last century!. The impact...
متن کاملLong-term Dynamics of Giant Sequoia Populations: Implications for Managing a Pioneer Species
My colleagues and I have analyzed the age structure of four populations of giant sequoia (Sequoiadendron giganteum [Lindl.] Buchholz). We have found the following: (1) The amount of successful reproduction in a grove cannot be judged by the sizes of its trees. (2) Sequoia populations almost certainly were near equilibrium or increasing before the arrival of European settlers. (3) In this centur...
متن کامل